package Collection;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

public class GenericDemo {
    public static void main(String[] args) {
        Collection<Point> c=new ArrayList<>();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        Iterator<Point> it =c.iterator();
        while (it.hasNext()){
            Point p= it.next();
            System.out.println(p);
        }
        for (Point p:c){
            System.out.println(p);
        }


//       Collection<String> c=new ArrayList<>();//泛型集合
//        c.add("one");
//        c.add("two");
//        c.add("three");
//        c.add("four");
//        c.add("five");
//        //迭代器所指定的泛型应当与其遍历的集合泛型一致
//        Iterator<String> it=c.iterator();
//        while (it.hasNext()){
//            String str=it.next();
//            System.out.println(str);
//        }
//        for (String str:c){
//            System.out.println(str);
//        }

    }
}
